Fix delimiters used in example, since defaults now don't include single dollars.

test/sample-dynamic.html

@@ -9,7 +9,7 @@
 <script type="text/x-mathjax-config">
   MathJax.Hub.Config({
     extensions: ["tex2jax.js"],
-    jax: ["input/TeX","output/HTML-CSS"]
+    jax: ["input/TeX","output/HTML-CSS"],
   });
 </script>
 <script type="text/javascript" src="../MathJax.js"></script>
@@ -74,7 +74,7 @@ input {margin-top: .7em}
 </script>
 
 <p>
-Type some $\rm\TeX$ code and press RETURN:<br /> 
+Type some \(\rm\TeX\) code and press RETURN:<br /> 
 <input id="MathInput" size="80" onchange="UpdateMath(this.value)" />
 </p>